Hello,
I have export a dress mesh with TSRW into .obj file. I edited it with Blender. At this point, all worked fine. But when I import the new mesh to TSRW, it didn't work. The tool didn't import the new mesh, I have an error message.
I made a lot of test with a friend, and we arrived at the conclusion that the problem is with Blender.
I tried :
* with the most recent version of Blender and the 2.6,
* with the last version of TSRW and an old version,
* to import a mesh into Blender and export it without edited it, but it didn't work.
* to rename the group "group 0" and "group 1" with and without this script : https://wiki.blender.org/index.php/...name_Datablocks

Could you help me ? If it's possible, I don't want to use MilkShape3D.

Hmm well, the thing is, because the plugins are quite broken, you're basically forced to do everything in Blender>Milkshape> game instead of Blender>game. Renaming things somehow never worked for me, and I know the blender tools should fix that, although the blender tools seem to only work with texture related things sadly, and not with.. well, bones related things, etc. Which is a shame.

So... Milkshape 3D in this case is basically the part where you make things 'game ready' Blender is actually where you make the meshes and prepare it for Milkshape. It's kind of sad, since I would rather have done everything in Blender as well, or a different program like Maya... :/

Thank you for your help.
I asked the same question on TSR, and they said that a plugin exist on the TSRW files : C:\Program Files (x86)\The Sims Resource\TSR Workshop\Extras\Blender 2.74
The plugin works. But I can't import the edited wso in TSRW.

Sadly... I guess regarding Blender, I don't think there's a way to fully create things with it unless someone fixes/creates a new script for it. I would have done it long ago if I had more experiences in writing 3D programming scripts, especially for Blender in this case